The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 30, 2007
Filed:
Mar. 18, 2002
Simon Paul Ashley Rix, Transvaal, ZA;
Andrew Glasspool, Basingstoke, GB;
Donald Watts Davies, Middlesex, GB;
Simon Paul Ashley Rix, Transvaal, ZA;
Andrew Glasspool, Basingstoke, GB;
Donald Watts Davies, Middlesex, GB;
Irdeto Access B.V., Hoofddorp, NL;
Abstract
A method of providing a secure communication between first and second devices is described. The method includes encrypting a random key using an encryption key at a first device and transferring the encrypted random key to the second device for encryption of data communicated from the second device to the first device. The encrypted data received from the second device is decrypted using the random key. The method typically includes transferring a control word encrypted with an encryption key to the second device for decryption, and encryption using the random key. The encrypted control word received from the second device is then decrypted using the random key. The invention extends to a method of enabling a decoder, and to a decoder, to decode a data stream. It also extends, inter alia, to a method of authenticating an enabling device and to an enabling device.